Abstract
The oxidative steam reforming of ethanol (OSRE) and water-gas shift (WGS) reactions were studied in a microchannel reactor. For OSRE, the experiments were conducted at atmospheric pressure, with water to ethanol molar ratio of 3 or 6 and oxygen to ethanol molar ratio ranging from 0.5 to 1.5, over a temperature range of 350–550°C on Rh/CeO2/γ-Al2O3 catalysts. Compared to SRE, the activity in OSRE was higher, but the selectivity to desired products was slightly lower. The H2 yield obtained in OSRE was ~120 m3.kg–1.h–1. For WGS, the experiments were conducted at atmospheric pressure in the temperature range of 250–400°C on Pt supported on different oxides. The order of activity for Pt supported on different oxides was CeO2-ZrO2 > CeO2 > TiO2 > ZrO2 > Al2O3. With Pt/CeO2-ZrO2/Al2O3 catalyst, conversions close to equilibrium could be obtained at 370°C and wt. of catalyst/molar flow rate of CO = 11.4 g.h.mol–1. Moreover, this catalyst did not show any deactivation in a 10 h run.
Published Version
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